Results 71 to 80 of about 178,552 (314)
On the cosmological implications of the string Swampland [PDF]
Physics Letters B, 2018 We study constraints imposed by two proposed string Swampland criteria on cosmology. These criteria involve an upper bound on the range traversed by scalar fields as well as a lower bound on | ∇ ϕ V | / V when V > 0 . We find that inflationary models are
P. Agrawal +3 more
semanticscholar +1 more source
Cosmological tests for a linear coasting cosmology
Physics Letters B, 2002 A strictly linear evolution of the scale factor is a characteristic feature in several classes of alternative gravity theories. In this article we investigate the overall viability of an open linear coasting cosmological model. We report that this model is consistent with gravitational lensing statistics (within $1σ$) and accomodates old high-redshift ...
Dev, Abha +3 more
openaire +2 more sources
7000 Years of Aboriginal Mining at Sugarloaf Hill in the Riverland Region of South Australia
Archaeology in Oceania, EarlyView.ABSTRACT Silcrete and chert are commonly represented in Aboriginal archaeological lithic assemblages across large parts of the southwestern Murray‐Darling Basin (MDB). In South Australia (SA), these materials were sourced from a series of quarries located along the incised course of the Murray River through the upper Riverland region.
Craig Westell +8 more
wiley +1 more source
Journal of High Energy PhysicsCosmological gravitational particle production (GPP) is a generic mechanism by which particles are produced during the inflationary epoch. In this work we consider the GPP of massive scalars in an effort to fully understand the spectrum of the produced ...
Leah Jenks, Edward W. Kolb, Keyer Thyme
doaj +1 more source
Vacuum energy with mass generation and Higgs bosons
Physics Letters B, 2020 We discuss the Higgs mass and cosmological constant hierarchy puzzles with emphasis on the interplay of Poincaré invariance, mass generation and renormalization group invariance.
Steven D. Bass, Janina Krzysiak
doaj +1 more source
The updated DESGW processing pipeline for the third LIGO/VIRGO observing run [PDF]
EPJ Web of Conferences, 2020 The DESGW group seeks to identify electromagnetic counterparts of gravitational wave events seen by the LIGO-VIRGO network, such as those expected from binary neutron star mergers or neutron star-black hole mergers.
Herner Kenneth +12 more
doaj +1 more source
E pur si muove: Galilean-invariant cosmological hydrodynamical simulations on a moving mesh [PDF]
, 2009 Hydrodynamic cosmological simulations at present usually employ either the Lagrangian smoothed particle hydrodynamics (SPH) technique or Eulerian hydrodynamics on a Cartesian mesh with (optional) adaptive mesh refinement (AMR). Both of these methods have
V. Springel
semanticscholar +1 more source
Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories. [PDF]
Physical Review Letters, 2017 The LIGO and VIRGO Collaborations have recently announced the detection of gravitational waves from a neutron star-neutron star merger (GW170817) and the simultaneous measurement of an optical counterpart (the γ-ray burst GRB 170817A).
Jeremy Sakstein, B. Jain
semanticscholar +1 more source
Processing of cosmological perturbations in a cyclic cosmology [PDF]
Physical Review D, 2009 5 pages, 1 ...
openaire +2 more sources
The THESEUS Space Mission and the Infrared Telescope Calibration Unit
Astronomische Nachrichten, EarlyView.ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó +9 more
wiley +1 more source